18872590 has 32 divisors (see below), whose sum is σ = 38068704. Its totient is φ = 6675840.

The previous prime is 18872573. The next prime is 18872593. The reversal of 18872590 is 9527881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1752 + ... + 6388.

It is an arithmetic number, because the mean of its divisors is an integer number (1189647).

Almost surely, 2^18872590 is an apocalyptic number.

18872590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18872590 is an abundant number, since it is smaller than the sum of its proper divisors (19196114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18872590 is a wasteful number, since it uses less digits than its factorization.

18872590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4692.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 18872590 is about 4344.2594305589. The cubic root of 18872590 is about 266.2423686528.

The spelling of 18872590 in words is "eighteen million, eight hundred seventy-two thousand, five hundred ninety".